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Features in the distribution of exoplanet parameters by period demonstratethat the distribution of planet parameters is rich with information that canprovide essential guidance to understanding planet histories. Structure hasbeen found in the counts of planet-star "objects" by period, and within thesestructures, there are different correlations of eccentricity with planetnumber, stellar metallicity, planet count density per log period, stellarmultiplicity, and planet mass. These appear to change with each other, and withstellar mass, but there are too few planets to easily and reliably study theseimportant relationships. These relationships are the bulk observables againstwhich the theory of planet formation and evolution must be tested. Theopportunity to determine the nature of the relationships of the exoplanetparameters on each other demonstrate the value of finding more planets acrossperiod ranging from days to thousands of days and beyond. We recommend supportfor continuing to find more planets, even giant planets, with periods up toperiods of a few thousand days. We also recommend support for the study of thedistribution of the many exoplanet parameters.

Characterizing the Distribution of Parameters of Planets Found by Radial Velocity is Essential for Understanding Planet Formation and Evolution